When you ask "What number is halfway between 25 and 618?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=618.
To find the number halfway between 25 and 618, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 618 into our formula, we get:
(25 + 618)/2 = 321.5
Thus, the number halfway between 25 and 618 is 321.5.
To check that our answer is correct, we subtract 25 from 321.5 and subtract 321.5 from 618 and compare the two numbers:
321.5 - 25 = 296.5
618 - 321.5 = 296.5
As you can see, the halfway number is 296.5 higher than 25 and 296.5 lower than 618. Therefore, our halfway between answer of 321.5 above is correct.
Halfway Between
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Halfway Between 25 and 619
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